Air cylinder



FIG. 1 is a top, front and right side perspective view of an air cylinder showing my new design;

FIG. 2 is a bottom, rear and left side perspective view thereof;

FIG. 3 is an enlarged top plan view thereof;

FIG. 4 is an enlarged front elevational view thereof, the rear being substantially similar in appearance;

FIG. 5 is an enlarged right side elevational view thereof;

FIG. 6 is an enlarged left side elevational view thereof;

FIG. 7 is a top, front and right side perspective view of a second embodiment thereof;

FIG. 8 is a bottom, rear and left side perspective view of the embodiment of FIG. 7;

FIG. 9 is an enlarged top plan view of the embodiment of FIG. 7;

FIG. 10 is an enlarged front elevational view of the embodiment of FIG. 7, the rear being substantially similar in appearance;

FIG. 11 is an enlarged right side elevational view of the embodiment of FIG. 7;

FIG. 12 is an enlarged left side elevational view of the embodiment of FIG. 7;

FIG. 13 is a top, front and right side perspective view of a third embodiment thereof;

FIG. 14 is a bottom, rear and left side perspective view of the embodiment of FIG. 13;

FIG. 15 is an enlarged top plan view of the embodiment of FIG. 13;

FIG. 16 is an enlarged front elevational view of the embodiment of FIG. 13, the rear being substantially similar in appearance;

FIG. 17 is an enlarged right side elevational view of the embodiment of FIG. 13;

FIG. 18 is an enlarged left side elevational view of the embodiment of FIG. 13;

FIG. 19 is a top, front and right side perspective view of a fourth embodiment thereof;

FIG. 20 is a bottom, rear and left side perspective view of the embodiment of FIG. 19;

FIG. 21 is an enlarged top plan view of the embodiment of FIG. 19;

FIG. 22 is an enlarged front elevational view of the embodiment of FIG. 19, the rear being substantially similar in appearance;

FIG. 23 is an enlarged right side elevational view of the embodiment of FIG. 19;

FIG. 24 is an enlarged left side elevational view of the embodiment of FIG. 19;

FIG. 25 is a top, front and right side perspective view of a fifth embodiment thereof;

FIG. 26 is a bottom, rear and left side perspective view of the embodiment of FIG. 25;

FIG. 27 is an enlarged top plan view of the embodiment of FIG. 25;

FIG. 28 is an enlarged front elevational view of the embodiment of FIG. 25, the rear being substantially similar in appearance;

FIG. 29 is an enlarged right side elevational view of the embodiment of FIG. 25; and

FIG. 30 is an enlarged left side elevational view of the embodiment of FIG. 25.

FIGS. 3, 4, 9, 10, 15, 16, 21, 22, 27 and 28 are shown with portions omitted for ease of illustration, and the broken-line showing of various elements is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for an air cylinder, substantially as shown and described. 